Movement in combat
Monsters are blocked by both friend and foe. Player characters can not move through enemies (besides very small ones) but can move through friendly characters by moving on a tile right behind them.
Characters can not move while preparing a special attack.
Characters cannot attack while performing a special action, another attack, and shortly after an attack. Characters can not move during an attack but in the pause between two attacks. The time an attack takes and the pause between two attacks is influenced by the character attributes and the weapon.
When a combatant performs an attack with a melee weapon, all enemies in the attack zone are affected. When the character uses a projectile weapon (like a bow) only the closest enemy is affected. All affected targets get a chance to evade. When they fail they receive damage according to the damage calculation rules. The shape and size of the attack zone depends on the weapon of the attacker.
Not conceptualized yet. Details will be found on Special attacks when they are conceptualized.
A character can not move, attack or perform any other special actions while preparing a spell. The spellcasting itself is an instant event. After each spellcast is a pause in which the character can not cast another spell but it can perform any other action. Details about the magic system can be found here.
Drinking a potion bottle or consuming another consumable item does not impair movement but prevents the character from attacking or using special attacks for a short time period.